It was definitely interfering with our splines that were anchored at 0,0 and 1,(trailing edge thickness) Having no uniform airfoil data, can lead to errors in airfoil simulation, or errors in CAD programs, or worse yet, unnoticed errors or perturbations in either, and unfair airfoil comparisons. Some people would even leave double data points for the leading edge in their airfoil files, because they had used two curves to draw the airfoil, and they both terminated in the same location. Some people like to eyeball their curves, and don’t really mind if they don’t pass through 0,0 exactly. Some people seem to have like drawing their airfoils on the x axis, as if they were resting on a table. ![]() it turns out that A LOT of the airfoils in that library where not drawn uniformly, either by their original designers, or by the catalogers. ![]() In our previous YouTube video, we had spent a lot of time making a spline fitting code for all the airfoils in the Illinois University library.
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